Loading patent…
AssigneeAir Products and Chemicals, Inc.
InventorsFrederick C. Wilhelm, Gene E. Parris, Brent A. Aufdembrink, Thomas R. Gaffney
Estimating the term…
This invention relates to a process for producing a nonequilibrium distribution of methylamines by the catalyzed reaction of methanol and/or dimethyl ether with ammonia and by the catalytic reforming of a methylamine containing feedstock. One process selectively affords a reaction product enriched in mono and dimethylamines and low in trimethylamine, at high conversion of methanol or dimethylether. A variation of the process effects reforming a methylamine containing feedstock, optionally containing ammonia over a catalyst. The key to achieving this low TMA selectivity at high conversion resides in the use of a microporous zeolite, preferably chabazite, catalyst having a geometric selectivity index (GSI) less about 3, a shape selectivity index (SSI) greater than about 5 and a sorption capacity for 1-PrOH of at least 0.5 mmol/g.
In a process for the production of a non-equilibrium mixture of methylamines comprising monomethylamine, dimethylamine, and trimethylamine by the catalytic reaction of a feedstock consisting methanol and dimethylether with ammonia, in the presence of a microporous catalyst, the improvement for enhancing the methanol or dimethylether conversion and reducing the production of trimethylamine in the methylamine reaction product, which comprises utilizing a catalyst having a geometric selectivity index less than about 3, a shape selective index of at least about 5 and a 1-PrOH sorption of at least about 0.5 mmol/g.
In a process for the production of a mixture of methylamines comprising monomethylamine, dimethylamine, and trimethylamine by the catalytic reforming of a feedstock containing monomethylamine in the presence of a catalyst, the improvement for reducing the production of trimethylamine in the reaction product, which comprises effecting reforming in the presence of a microporous catalyst having a geometric selectivity index less than about 3, a shape selective index of at least about 5 and a 1-PrOH sorption of at least about 0.5 mmol/g.
Dependencies are inferred from the claim text.